The Trinity Universe was, in general, a science fiction setting, using the Revised Storyteller System. While not a game line by itself, it was the shared universe of several additional games. Each game represents a point along a continuum. The common factor in each TU game was the Æon Society, a semi-secret organization dedicated to protecting the human race.
- Adventure!: A game of pulp action set in the 1920s, where players take on the role of one of three types of Inspired: daredevils, stalwarts, and mesmerists.
- Aberrant: A game of superpowers in the early 2000s, wherein players assume the role of novas, the next evolution of Adventure!'s stalwarts.
- Trinity: (Originally ÆON.) A science fiction game set in the 2120s, where players take on the role of psions, the next evolution of Adventure!'s mesmerists.
- Trinity: Battleground: A miniatures game based on Trinity, with players taking the role of either Legionnaires or Aberrants on Khantze Lu Ge.